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Finding the Fourth Proportional to 948.76, 1,309.28 and 529.09

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Solution

The fourth proportional to 948.76, 1,309.28 and 529.09 is: 730.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.76 : 1,309.28 = 529.09 : x
  2. Step 2: Convert to fraction form
    948.76/1,309.28 = 529.09/x
  3. Step 3: Cross multiply
    948.76x = 1,309.28 × 529.09
  4. Step 4: Simplify right side
    948.76x = 692,717.76
  5. Step 5: Solve for x
    x = 692,717.76/948.76
  6. Step 6: Final answer
    x = 730.13

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.